Yealink IP phones allow you to register a SIP account using the buttons or touch screen. The exact steps may vary between Yealink models. In this example, we will register a Yealink T57W using the touchscreen.
Open the Menu
Press the Menu button
Open Advanced Settings
In the main menu, press Advanced
Enter the Admin password
The default password is "admin"
Open Accounts
Press accounts, and choose an account to register
Enter the SIP details
The SIP details can be found in the Devices section of your customer portal PBX
Save the details
Once you have entered the SIP details, press Save
The account is now registered
If all settings were entered correctly, the device will now be online and registered